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authorLibravatar Rutger Broekhoff2024-01-02 18:56:31 +0100
committerLibravatar Rutger Broekhoff2024-01-02 18:56:31 +0100
commit8db41da676ac8368ef7c2549d56239a5ff5eedde (patch)
tree09c427fd66de2ec1ebffc8342f5fdbb84b0701b5 /vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go
parentd4f75fb6db22e57577867445a022227e70958931 (diff)
downloadgitolfs3-8db41da676ac8368ef7c2549d56239a5ff5eedde.tar.gz
gitolfs3-8db41da676ac8368ef7c2549d56239a5ff5eedde.zip
Delete vendor directory
Diffstat (limited to 'vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go')
-rw-r--r--vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go121
1 files changed, 0 insertions, 121 deletions
diff --git a/vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go b/vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go
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--- a/vendor/github.com/klauspost/cpuid/v2/os_darwin_arm64.go
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1// Copyright (c) 2020 Klaus Post, released under MIT License. See LICENSE file.
2
3package cpuid
4
5import (
6 "runtime"
7 "strings"
8
9 "golang.org/x/sys/unix"
10)
11
12func detectOS(c *CPUInfo) bool {
13 if runtime.GOOS != "ios" {
14 tryToFillCPUInfoFomSysctl(c)
15 }
16 // There are no hw.optional sysctl values for the below features on Mac OS 11.0
17 // to detect their supported state dynamically. Assume the CPU features that
18 // Apple Silicon M1 supports to be available as a minimal set of features
19 // to all Go programs running on darwin/arm64.
20 // TODO: Add more if we know them.
21 c.featureSet.setIf(runtime.GOOS != "ios", AESARM, PMULL, SHA1, SHA2)
22
23 return true
24}
25
26func sysctlGetBool(name string) bool {
27 value, err := unix.SysctlUint32(name)
28 if err != nil {
29 return false
30 }
31 return value != 0
32}
33
34func sysctlGetString(name string) string {
35 value, err := unix.Sysctl(name)
36 if err != nil {
37 return ""
38 }
39 return value
40}
41
42func sysctlGetInt(unknown int, names ...string) int {
43 for _, name := range names {
44 value, err := unix.SysctlUint32(name)
45 if err != nil {
46 continue
47 }
48 if value != 0 {
49 return int(value)
50 }
51 }
52 return unknown
53}
54
55func sysctlGetInt64(unknown int, names ...string) int {
56 for _, name := range names {
57 value64, err := unix.SysctlUint64(name)
58 if err != nil {
59 continue
60 }
61 if int(value64) != unknown {
62 return int(value64)
63 }
64 }
65 return unknown
66}
67
68func setFeature(c *CPUInfo, name string, feature FeatureID) {
69 c.featureSet.setIf(sysctlGetBool(name), feature)
70}
71func tryToFillCPUInfoFomSysctl(c *CPUInfo) {
72 c.BrandName = sysctlGetString("machdep.cpu.brand_string")
73
74 if len(c.BrandName) != 0 {
75 c.VendorString = strings.Fields(c.BrandName)[0]
76 }
77
78 c.PhysicalCores = sysctlGetInt(runtime.NumCPU(), "hw.physicalcpu")
79 c.ThreadsPerCore = sysctlGetInt(1, "machdep.cpu.thread_count", "kern.num_threads") /
80 sysctlGetInt(1, "hw.physicalcpu")
81 c.LogicalCores = sysctlGetInt(runtime.NumCPU(), "machdep.cpu.core_count")
82 c.Family = sysctlGetInt(0, "machdep.cpu.family", "hw.cpufamily")
83 c.Model = sysctlGetInt(0, "machdep.cpu.model")
84 c.CacheLine = sysctlGetInt64(0, "hw.cachelinesize")
85 c.Cache.L1I = sysctlGetInt64(-1, "hw.l1icachesize")
86 c.Cache.L1D = sysctlGetInt64(-1, "hw.l1dcachesize")
87 c.Cache.L2 = sysctlGetInt64(-1, "hw.l2cachesize")
88 c.Cache.L3 = sysctlGetInt64(-1, "hw.l3cachesize")
89
90 // from https://developer.arm.com/downloads/-/exploration-tools/feature-names-for-a-profile
91 setFeature(c, "hw.optional.arm.FEAT_AES", AESARM)
92 setFeature(c, "hw.optional.AdvSIMD", ASIMD)
93 setFeature(c, "hw.optional.arm.FEAT_DotProd", ASIMDDP)
94 setFeature(c, "hw.optional.arm.FEAT_RDM", ASIMDRDM)
95 setFeature(c, "hw.optional.FEAT_CRC32", CRC32)
96 setFeature(c, "hw.optional.arm.FEAT_DPB", DCPOP)
97 // setFeature(c, "", EVTSTRM)
98 setFeature(c, "hw.optional.arm.FEAT_FCMA", FCMA)
99 setFeature(c, "hw.optional.arm.FEAT_FP", FP)
100 setFeature(c, "hw.optional.arm.FEAT_FP16", FPHP)
101 setFeature(c, "hw.optional.arm.FEAT_PAuth", GPA)
102 setFeature(c, "hw.optional.arm.FEAT_JSCVT", JSCVT)
103 setFeature(c, "hw.optional.arm.FEAT_LRCPC", LRCPC)
104 setFeature(c, "hw.optional.arm.FEAT_PMULL", PMULL)
105 setFeature(c, "hw.optional.arm.FEAT_SHA1", SHA1)
106 setFeature(c, "hw.optional.arm.FEAT_SHA256", SHA2)
107 setFeature(c, "hw.optional.arm.FEAT_SHA3", SHA3)
108 setFeature(c, "hw.optional.arm.FEAT_SHA512", SHA512)
109 // setFeature(c, "", SM3)
110 // setFeature(c, "", SM4)
111 setFeature(c, "hw.optional.arm.FEAT_SVE", SVE)
112
113 // from empirical observation
114 setFeature(c, "hw.optional.AdvSIMD_HPFPCvt", ASIMDHP)
115 setFeature(c, "hw.optional.armv8_1_atomics", ATOMICS)
116 setFeature(c, "hw.optional.floatingpoint", FP)
117 setFeature(c, "hw.optional.armv8_2_sha3", SHA3)
118 setFeature(c, "hw.optional.armv8_2_sha512", SHA512)
119 setFeature(c, "hw.optional.armv8_3_compnum", FCMA)
120 setFeature(c, "hw.optional.armv8_crc32", CRC32)
121}